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a wide-angle lens

A wide-angle lens and lens technology, applied in the field of wide-angle lens systems, can solve problems such as distortion, achieve the effects of light weight, lower surface cleanliness requirements, and easy assembly and production

Active Publication Date: 2016-01-06
NINGBO SUNNY AUTOMOTIVE OPTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a wide-angle lens, which solves the problem of severe distortion when the field of view of the wide-angle lens exceeds 90°, and its technical solution is as follows:

Method used

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Embodiment Construction

[0045] Embodiment 1 of the present invention is as Figure 1 to Figure 4 As shown, the lens sequentially includes a front lens group with negative refractive power, a stop, and a rear lens group with positive refractive power from the object side to the image side, and the front lens group includes sequentially from the object side The first lens L1, the second lens L2, and the third lens L3. The rear lens group includes a fourth lens L4, a fifth lens L5, and a sixth lens L6 in sequence from the object side.

[0046] Such as figure 1 As shown, the lenses from the object side to the image side are first lens L1, second lens L2, third lens L3, aperture r7, fourth lens L4, fifth lens L5, sixth lens L6, color filter Slice GF, imaging surface IMA.

[0047] The first lens L1 is a negative meniscus lens with negative refractive power, which is a glass lens element with spherical surfaces on both sides; the second lens L2 is a lens with negative refractive power, and is a plastic le...

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Abstract

The invention provides a wide-angle lens which comprises a front lens set with negative focal power, a diaphragm and a rear lens set with positive focal power from an object space to an image space in sequence. The front lens set comprises a first lens, a second lens and a third lens from the object space side in sequence, wherein the first lens is a negative meniscus lens protruding towards the object space, the second lens is a negative meniscus lens or a biconcave lens, and the third lens is a biconvex positive focal power lens. The rear lens set comprises a fourth lens, a fifth lens and a sixth lens from the object space side in sequence, wherein the fourth lens and the fifth lens form a bonding lens, the fourth lens has positive focal power, the fifth lens has negative focal power, the sixth lens is a biconvex positive focal power lens, and at least four lens contained in the lens from the second lens to the sixth lens are aspheric lenses. The wide-angle lens is low in cost, low in weight, little in distortion, small in size, high in light pervious performance and capable of meeting the requirement of high definition.

Description

technical field [0001] The invention relates to a wide-angle lens system, which is especially suitable for outdoor monitoring and vehicle-mounted wide-angle lenses with harsh environments. Background technique [0002] At present, the high-definition wide-angle lens is generally composed of 5 to 8 glass lenses. For example, the wide-angle lens with the Chinese Patent No. 200710201261 ​​is composed of 6 glass lenses. After that, the distortion will be very serious. For this reason, there are also wide-angle lenses developed by companies that use aspheric technology to reduce distortion. For example, the wide-angle lens with the US Patent No. US2009251801A1 is composed of 6 lenses, including 2 aspherical lenses. Although optical distortion can be corrected, but The lens size is larger and the growth is higher. Contents of the invention [0003] The present invention provides a wide-angle lens, which solves the problem of severe distortion when the field of view of the wide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/18G02B13/00G02B1/04
Inventor 裘文伟
Owner NINGBO SUNNY AUTOMOTIVE OPTECH
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